The first set of results use synthetic request arrival and rent cost sequences. Unless stated otherwise, the request arrival process is i.i.d. Bernoulli with parameter \(p\) . We model the time-varying rent cost sequence using the Autoregressive moving-average (ARMA) model [1]}, specifically, ARMA(4,2). To choose the parameters of the model, we fit the model to real world price data obtained from [2]}, which provides region-wise prices of unused EC2 capacity in the Amazon Web Services (AWS) cloud.
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